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Pandemic A/H1N1 influenza: transmission of the first cases in Spain.
Enferm Infecc Microbiol Clin
February 2012
Parc de Salut Mar-Universitat Pompeu Fabra-Public Health Agency of Barcelona, Spain.
Introduction: Pandemic A/H1N1 influenza emerged in Mexico at the end of March 2009. Since then, it is still important to provide evidences that contributed to the international spread of the virus and to ascertain the attack rate of this new strain of influenza among the first cases in Spain that led to identify the first transmission in Europe.
Methods: Three pandemic A/H1N1 influenza groups related to an overseas flight were studied: 71 student group, 94 remaining passengers, and 68 contacts of confirmed cases.